diff --git a/LanguageData/iso6393 b/LanguageData/iso6393
index f2e3b42..609f30b 100644
--- a/LanguageData/iso6393
+++ b/LanguageData/iso6393
@@ -1215,7 +1215,7 @@ cek				I	L	Eastern Khumi Chin
 cen				I	L	Cen	
 ces	cze	ces	cs	I	L	Czech	
 cet				I	L	Centúúm	
-cey				I	L	Laoktu Chin	
+cey				I	L	Ekai Chin	
 cfa				I	L	Dijim-Bwilim	
 cfd				I	L	Cara	
 cfg				I	L	Como Karim	
@@ -3991,7 +3991,7 @@ mgl				I	L	Maleu-Kilenge
 mgm				I	L	Mambae	
 mgn				I	L	Mbangi	
 mgo				I	L	Meta'	
-mgp				I	L	Magar	
+mgp				I	L	Eastern Magar	
 mgq				I	L	Malila	
 mgr				I	L	Mambwe-Lungu	
 mgs				I	L	Manda (Tanzania)	
@@ -4248,10 +4248,11 @@ mqz				I	L	Pano
 mra				I	L	Mlabri	
 mrb				I	L	Marino	
 mrc				I	L	Maricopa	
+mrd				I	L	Western Magar	
 mre				I	E	Martha's Vineyard Sign Language	
 mrf				I	L	Elseng	
 mrg				I	L	Mising	
-mrh				I	L	Mara	
+mrh				I	L	Mara Chin	
 mri	mao	mri	mi	I	L	Maori	
 mrj				I	L	Western Mari	
 mrk				I	L	Hmwaveke	
@@ -5842,6 +5843,7 @@ shh				I	L	Shoshoni
 shi				I	L	Tachelhit	
 shj				I	L	Shatt	
 shk				I	L	Shilluk	
+shl				I	L	Shendu	
 shm				I	L	Shahrudi	
 shn	shn	shn		I	L	Shan	
 sho				I	L	Shanga	
diff --git a/LanguageData/iso6393.json b/LanguageData/iso6393.json
index 4241fe9..43e31be 100644
--- a/LanguageData/iso6393.json
+++ b/LanguageData/iso6393.json
@@ -7435,7 +7435,7 @@
       "Id": "cey",
       "Scope": "I",
       "LanguageType": "L",
-      "RefName": "Laoktu Chin"
+      "RefName": "Ekai Chin"
     },
     {
       "Id": "cfa",
@@ -24538,7 +24538,7 @@
       "Id": "mgp",
       "Scope": "I",
       "LanguageType": "L",
-      "RefName": "Magar"
+      "RefName": "Eastern Magar"
     },
     {
       "Id": "mgq",
@@ -26102,6 +26102,12 @@
       "LanguageType": "L",
       "RefName": "Maricopa"
     },
+    {
+      "Id": "mrd",
+      "Scope": "I",
+      "LanguageType": "L",
+      "RefName": "Western Magar"
+    },
     {
       "Id": "mre",
       "Scope": "I",
@@ -26124,7 +26130,7 @@
       "Id": "mrh",
       "Scope": "I",
       "LanguageType": "L",
-      "RefName": "Mara"
+      "RefName": "Mara Chin"
     },
     {
       "Id": "mri",
@@ -35847,6 +35853,12 @@
       "LanguageType": "L",
       "RefName": "Shilluk"
     },
+    {
+      "Id": "shl",
+      "Scope": "I",
+      "LanguageType": "L",
+      "RefName": "Shendu"
+    },
     {
       "Id": "shm",
       "Scope": "I",
diff --git a/LanguageData/rfc5646 b/LanguageData/rfc5646
index 7bce29e..d9dd4f5 100644
--- a/LanguageData/rfc5646
+++ b/LanguageData/rfc5646
@@ -1,4 +1,4 @@
-File-Date: 2026-06-14
+File-Date: 2026-08-08
 %%
 Type: language
 Subtag: aa
@@ -7623,7 +7623,7 @@ Added: 2009-07-29
 %%
 Type: language
 Subtag: cey
-Description: Ekai Chin
+Description: Laoktu Chin
 Added: 2019-04-16
 %%
 Type: language
@@ -22170,7 +22170,8 @@ Added: 2009-07-29
 %%
 Type: language
 Subtag: mgp
-Description: Eastern Magar
+Description: Magar
+Description: Magar Dhut
 Added: 2009-07-29
 %%
 Type: language
@@ -23512,6 +23513,8 @@ Type: language
 Subtag: mrd
 Description: Western Magar
 Added: 2009-07-29
+Deprecated: 2026-08-08
+Preferred-Value: mgp
 %%
 Type: language
 Subtag: mre
@@ -23530,7 +23533,8 @@ Added: 2009-07-29
 %%
 Type: language
 Subtag: mrh
-Description: Mara Chin
+Description: Mara
+Description: Shendu
 Added: 2009-07-29
 %%
 Type: language
@@ -31544,6 +31548,7 @@ Added: 2009-07-29
 Type: language
 Subtag: scs
 Description: North Slavey
+Description: Dene Kedé
 Added: 2009-07-29
 Macrolanguage: den
 %%
@@ -32021,6 +32026,8 @@ Type: language
 Subtag: shl
 Description: Shendu
 Added: 2009-07-29
+Deprecated: 2026-08-08
+Preferred-Value: mrh
 %%
 Type: language
 Subtag: shm
@@ -34187,6 +34194,7 @@ Added: 2009-07-29
 Type: language
 Subtag: tce
 Description: Southern Tutchone
+Description: Dän K'è
 Added: 2009-07-29
 %%
 Type: language
@@ -40271,6 +40279,7 @@ Comments: see also suj
 Type: language
 Subtag: xsl
 Description: South Slavey
+Description: Dene Zhatié
 Added: 2009-07-29
 Macrolanguage: den
 %%
diff --git a/LanguageData/rfc5646.json b/LanguageData/rfc5646.json
index 1e7af21..c3e1883 100644
--- a/LanguageData/rfc5646.json
+++ b/LanguageData/rfc5646.json
@@ -1,5 +1,5 @@
 {
-  "FileDate": "2026-06-14",
+  "FileDate": "2026-08-08",
   "RecordList": [
     {
       "Type": "Language",
@@ -16228,7 +16228,7 @@
       "Type": "Language",
       "SubTag": "cey",
       "Description": [
-        "Ekai Chin"
+        "Laoktu Chin"
       ],
       "Added": "2019-04-16",
       "Scope": "None",
@@ -47597,7 +47597,8 @@
       "Type": "Language",
       "SubTag": "mgp",
       "Description": [
-        "Eastern Magar"
+        "Magar",
+        "Magar Dhut"
       ],
       "Added": "2009-07-29",
       "Scope": "None",
@@ -50507,8 +50508,10 @@
       ],
       "Added": "2009-07-29",
       "Scope": "None",
+      "Deprecated": "2026-08-08",
       "Comments": [],
-      "Prefix": []
+      "Prefix": [],
+      "PreferredValue": "mgp"
     },
     {
       "Type": "Language",
@@ -50547,7 +50550,8 @@
       "Type": "Language",
       "SubTag": "mrh",
       "Description": [
-        "Mara Chin"
+        "Mara",
+        "Shendu"
       ],
       "Added": "2009-07-29",
       "Scope": "None",
@@ -67825,7 +67829,8 @@
       "Type": "Language",
       "SubTag": "scs",
       "Description": [
-        "North Slavey"
+        "North Slavey",
+        "Dene Ked\u00E9"
       ],
       "Added": "2009-07-29",
       "Scope": "None",
@@ -68856,8 +68861,10 @@
       ],
       "Added": "2009-07-29",
       "Scope": "None",
+      "Deprecated": "2026-08-08",
       "Comments": [],
-      "Prefix": []
+      "Prefix": [],
+      "PreferredValue": "mrh"
     },
     {
       "Type": "Language",
@@ -73543,7 +73550,8 @@
       "Type": "Language",
       "SubTag": "tce",
       "Description": [
-        "Southern Tutchone"
+        "Southern Tutchone",
+        "D\u00E4n K\u0027\u00E8"
       ],
       "Added": "2009-07-29",
       "Scope": "None",
@@ -86727,7 +86735,8 @@
       "Type": "Language",
       "SubTag": "xsl",
       "Description": [
-        "South Slavey"
+        "South Slavey",
+        "Dene Zhati\u00E9"
       ],
       "Added": "2009-07-29",
       "Scope": "None",
diff --git a/LanguageTags/Iso6393DataGen.cs b/LanguageTags/Iso6393DataGen.cs
index 9e5263e..acc2a8d 100644
--- a/LanguageTags/Iso6393DataGen.cs
+++ b/LanguageTags/Iso6393DataGen.cs
@@ -13399,7 +13399,7 @@ public static Iso6393Data Create() =>
                     Part1 = null,
                     Scope = "I",
                     LanguageType = "L",
-                    RefName = "Laoktu Chin",
+                    RefName = "Ekai Chin",
                     Comment = null,
                 },
                 new()
@@ -43935,7 +43935,7 @@ public static Iso6393Data Create() =>
                     Part1 = null,
                     Scope = "I",
                     LanguageType = "L",
-                    RefName = "Magar",
+                    RefName = "Eastern Magar",
                     Comment = null,
                 },
                 new()
@@ -46755,6 +46755,17 @@ public static Iso6393Data Create() =>
                     Comment = null,
                 },
                 new()
+                {
+                    Id = "mrd",
+                    Part2B = null,
+                    Part2T = null,
+                    Part1 = null,
+                    Scope = "I",
+                    LanguageType = "L",
+                    RefName = "Western Magar",
+                    Comment = null,
+                },
+                new()
                 {
                     Id = "mre",
                     Part2B = null,
@@ -46795,7 +46806,7 @@ public static Iso6393Data Create() =>
                     Part1 = null,
                     Scope = "I",
                     LanguageType = "L",
-                    RefName = "Mara",
+                    RefName = "Mara Chin",
                     Comment = null,
                 },
                 new()
@@ -64289,6 +64300,17 @@ public static Iso6393Data Create() =>
                     Comment = null,
                 },
                 new()
+                {
+                    Id = "shl",
+                    Part2B = null,
+                    Part2T = null,
+                    Part1 = null,
+                    Scope = "I",
+                    LanguageType = "L",
+                    RefName = "Shendu",
+                    Comment = null,
+                },
+                new()
                 {
                     Id = "shm",
                     Part2B = null,
diff --git a/LanguageTags/Rfc5646DataGen.cs b/LanguageTags/Rfc5646DataGen.cs
index b9d0999..470f85c 100644
--- a/LanguageTags/Rfc5646DataGen.cs
+++ b/LanguageTags/Rfc5646DataGen.cs
@@ -13,7 +13,7 @@ public sealed partial class Rfc5646Data
     public static Rfc5646Data Create() =>
         new()
         {
-            FileDate = new DateOnly(2026, 6, 14),
+            FileDate = new DateOnly(2026, 8, 8),
             RecordList =
             [
                 new()
@@ -21694,7 +21694,7 @@ public static Rfc5646Data Create() =>
                     Deprecated = null,
                     PreferredValue = null,
                     Tag = null,
-                    Description = [@"Ekai Chin"],
+                    Description = [@"Laoktu Chin"],
                     Comments = [],
                     Prefix = [],
                 },
@@ -63829,7 +63829,7 @@ public static Rfc5646Data Create() =>
                     Deprecated = null,
                     PreferredValue = null,
                     Tag = null,
-                    Description = [@"Eastern Magar"],
+                    Description = [@"Magar", @"Magar Dhut"],
                     Comments = [],
                     Prefix = [],
                 },
@@ -67741,8 +67741,8 @@ public static Rfc5646Data Create() =>
                     SuppressScript = null,
                     Scope = Rfc5646Record.RecordScope.None,
                     MacroLanguage = null,
-                    Deprecated = null,
-                    PreferredValue = null,
+                    Deprecated = new DateOnly(2026, 8, 8),
+                    PreferredValue = "mgp",
                     Tag = null,
                     Description = [@"Western Magar"],
                     Comments = [],
@@ -67804,7 +67804,7 @@ public static Rfc5646Data Create() =>
                     Deprecated = null,
                     PreferredValue = null,
                     Tag = null,
-                    Description = [@"Mara Chin"],
+                    Description = [@"Mara", @"Shendu"],
                     Comments = [],
                     Prefix = [],
                 },
@@ -91005,7 +91005,7 @@ public static Rfc5646Data Create() =>
                     Deprecated = null,
                     PreferredValue = null,
                     Tag = null,
-                    Description = [@"North Slavey"],
+                    Description = [@"North Slavey", @"Dene Kedé"],
                     Comments = [],
                     Prefix = [],
                 },
@@ -92386,8 +92386,8 @@ public static Rfc5646Data Create() =>
                     SuppressScript = null,
                     Scope = Rfc5646Record.RecordScope.None,
                     MacroLanguage = null,
-                    Deprecated = null,
-                    PreferredValue = null,
+                    Deprecated = new DateOnly(2026, 8, 8),
+                    PreferredValue = "mrh",
                     Tag = null,
                     Description = [@"Shendu"],
                     Comments = [],
@@ -98719,7 +98719,7 @@ public static Rfc5646Data Create() =>
                     Deprecated = null,
                     PreferredValue = null,
                     Tag = null,
-                    Description = [@"Southern Tutchone"],
+                    Description = [@"Southern Tutchone", @"Dän K'è"],
                     Comments = [],
                     Prefix = [],
                 },
@@ -116464,7 +116464,7 @@ public static Rfc5646Data Create() =>
                     Deprecated = null,
                     PreferredValue = null,
                     Tag = null,
-                    Description = [@"South Slavey"],
+                    Description = [@"South Slavey", @"Dene Zhatié"],
                     Comments = [],
                     Prefix = [],
                 },